/* * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (C) 2001 Benno Rice * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $ */ #include __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include "opt_compat.h" #include "opt_kstack_pages.h" #include "opt_msgbuf.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int cold = 1; char pcpu0[PAGE_SIZE]; char uarea0[UAREA_PAGES * PAGE_SIZE]; struct trapframe frame0; vm_offset_t kstack0; vm_offset_t kstack0_phys; char machine[] = "powerpc"; SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); static char model[128]; SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, ""); static int cacheline_size = CACHELINESIZE; SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size, CTLFLAG_RD, &cacheline_size, 0, ""); #ifdef DDB /* start and end of kernel symbol table */ void *ksym_start, *ksym_end; #endif /* DDB */ static void cpu_startup(void *); SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL) void powerpc_init(u_int, u_int, u_int, void *); int save_ofw_mapping(void); int restore_ofw_mapping(void); void install_extint(void (*)(void)); int setfault(faultbuf); /* defined in locore.S */ static int grab_mcontext(struct thread *, mcontext_t *, int); void asm_panic(char *); long Maxmem = 0; struct pmap ofw_pmap; extern int ofmsr; struct bat battable[16]; struct kva_md_info kmi; static void powerpc_ofw_shutdown(void *junk, int howto) { if (howto & RB_HALT) { OF_halt(); } OF_reboot(); } static void cpu_startup(void *dummy) { /* * Initialise the decrementer-based clock. */ decr_init(); /* * Good {morning,afternoon,evening,night}. */ cpu_setup(PCPU_GET(cpuid)); /* startrtclock(); */ #ifdef PERFMON perfmon_init(); #endif printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem), ptoa(Maxmem) / 1048576); /* * Display any holes after the first chunk of extended memory. */ if (bootverbose) { int indx; printf("Physical memory chunk(s):\n"); for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { int size1 = phys_avail[indx + 1] - phys_avail[indx]; printf("0x%08x - 0x%08x, %d bytes (%d pages)\n", phys_avail[indx], phys_avail[indx + 1] - 1, size1, size1 / PAGE_SIZE); } } vm_ksubmap_init(&kmi); printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count), ptoa(cnt.v_free_count) / 1048576); /* * Set up buffers, so they can be used to read disk labels. */ bufinit(); vm_pager_bufferinit(); EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0, SHUTDOWN_PRI_LAST); #ifdef SMP /* * OK, enough kmem_alloc/malloc state should be up, lets get on with it! */ mp_start(); /* fire up the secondaries */ mp_announce(); #endif /* SMP */ } extern char kernel_text[], _end[]; extern void *trapcode, *trapsize; extern void *alitrap, *alisize; extern void *dsitrap, *dsisize; extern void *decrint, *decrsize; extern void *extint, *extsize; extern void *ddblow, *ddbsize; void powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp) { struct pcpu *pc; vm_offset_t end, off; void *kmdp; end = 0; kmdp = NULL; /* * Parse metadata if present and fetch parameters. Must be done * before console is inited so cninit gets the right value of * boothowto. */ if (mdp != NULL) { preload_metadata = mdp; kmdp = preload_search_by_type("elf kernel"); if (kmdp != NULL) { boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); } } /* * Init params/tunables that can be overridden by the loader */ init_param1(); /* * Start initializing proc0 and thread0. */ proc_linkup(&proc0, &ksegrp0, &kse0, &thread0); proc0.p_uarea = (struct user *)uarea0; proc0.p_stats = &proc0.p_uarea->u_stats; thread0.td_frame = &frame0; /* * Set up per-cpu data. */ pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1; pcpu_init(pc, 0, sizeof(struct pcpu)); pc->pc_curthread = &thread0; pc->pc_curpcb = thread0.td_pcb; pc->pc_cpuid = 0; /* pc->pc_mid = mid; */ __asm __volatile("mtsprg 0, %0" :: "r"(pc)); mutex_init(); /* * Initialize the console before printing anything. */ cninit(); /* * Complain if there is no metadata. */ if (mdp == NULL || kmdp == NULL) { printf("powerpc_init: no loader metadata.\n"); } #ifdef DDB kdb_init(); #endif /* * XXX: Initialize the interrupt tables. */ bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize); bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize); bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize); bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize); #ifdef DDB bcopy(&ddblow, (void *)EXC_PGM, (size_t)&ddbsize); bcopy(&ddblow, (void *)EXC_TRC, (size_t)&ddbsize); bcopy(&ddblow, (void *)EXC_BPT, (size_t)&ddbsize); #endif __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD); /* * Make sure translation has been enabled */ mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI); /* * Initialise virtual memory. */ pmap_bootstrap(startkernel, endkernel); /* * Initialize params/tunables that are derived from memsize */ init_param2(physmem); /* * Finish setting up thread0. */ thread0.td_kstack = kstack0; thread0.td_pcb = (struct pcb *) (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; /* * Map and initialise the message buffer. */ for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE) pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off); msgbufinit(msgbufp, MSGBUF_SIZE); } void bzero(void *buf, size_t len) { caddr_t p; p = buf; while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) { *p++ = 0; len--; } while (len >= sizeof(u_long) * 8) { *(u_long*) p = 0; *((u_long*) p + 1) = 0; *((u_long*) p + 2) = 0; *((u_long*) p + 3) = 0; len -= sizeof(u_long) * 8; *((u_long*) p + 4) = 0; *((u_long*) p + 5) = 0; *((u_long*) p + 6) = 0; *((u_long*) p + 7) = 0; p += sizeof(u_long) * 8; } while (len >= sizeof(u_long)) { *(u_long*) p = 0; len -= sizeof(u_long); p += sizeof(u_long); } while (len) { *p++ = 0; len--; } } void sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) { struct trapframe *tf; struct sigframe *sfp; struct sigacts *psp; struct sigframe sf; struct thread *td; struct proc *p; int oonstack, rndfsize; td = curthread; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); psp = p->p_sigacts; mtx_assert(&psp->ps_mtx, MA_OWNED); tf = td->td_frame; oonstack = sigonstack(tf->fixreg[1]); rndfsize = ((sizeof(sf) + 15) / 16) * 16; CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, catcher, sig); /* * Save user context */ memset(&sf, 0, sizeof(sf)); grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0); sf.sf_uc.uc_sigmask = *mask; sf.sf_uc.uc_stack = td->td_sigstk; sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE; sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0; /* * Allocate and validate space for the signal handler context. */ if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp + td->td_sigstk.ss_size - rndfsize); } else { sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize); } /* * Translate the signal if appropriate (Linux emu ?) */ if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; /* * Save the floating-point state, if necessary, then copy it. */ /* XXX */ /* * Set up the registers to return to sigcode. * * r1/sp - sigframe ptr * lr - sig function, dispatched to by blrl in trampoline * r3 - sig number * r4 - SIGINFO ? &siginfo : exception code * r5 - user context * srr0 - trampoline function addr */ tf->lr = (register_t)catcher; tf->fixreg[1] = (register_t)sfp; tf->fixreg[FIRSTARG] = sig; tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc; if (SIGISMEMBER(psp->ps_siginfo, sig)) { /* * Signal handler installed with SA_SIGINFO. */ tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si; /* * Fill siginfo structure. */ sf.sf_si.si_signo = sig; sf.sf_si.si_code = code; sf.sf_si.si_addr = (void *)tf->srr0; } else { /* Old FreeBSD-style arguments. */ tf->fixreg[FIRSTARG+1] = code; } mtx_unlock(&psp->ps_mtx); PROC_UNLOCK(p); tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); /* * copy the frame out to userland. */ if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) { /* * Process has trashed its stack. Kill it. */ CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp); PROC_LOCK(p); sigexit(td, SIGILL); } CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->srr0, tf->fixreg[1]); PROC_LOCK(p); mtx_lock(&psp->ps_mtx); } /* * Build siginfo_t for SA thread */ void cpu_thread_siginfo(int sig, u_long code, siginfo_t *si) { struct proc *p; struct thread *td; td = curthread; p = td->td_proc; PROC_LOCK_ASSERT(p, MA_OWNED); bzero(si, sizeof(*si)); si->si_signo = sig; si->si_code = code; /* XXXKSE fill other fields */ } int sigreturn(struct thread *td, struct sigreturn_args *uap) { struct proc *p; ucontext_t uc; int error; CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp); if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) { CTR1(KTR_SIG, "sigreturn: efault td=%p", td); return (EFAULT); } error = set_mcontext(td, &uc.uc_mcontext); if (error != 0) return (error); p = td->td_proc; PROC_LOCK(p); td->td_sigmask = uc.uc_sigmask; SIG_CANTMASK(td->td_sigmask); signotify(td); PROC_UNLOCK(p); CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); return (EJUSTRETURN); } #ifdef COMPAT_FREEBSD4 int freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap) { return sigreturn(td, (struct sigreturn_args *)uap); } #endif /* * get_mcontext/sendsig helper routine that doesn't touch the * proc lock */ static int grab_mcontext(struct thread *td, mcontext_t *mcp, int flags) { struct pcb *pcb; pcb = td->td_pcb; memset(mcp, 0, sizeof(mcontext_t)); mcp->mc_vers = _MC_VERSION; mcp->mc_flags = 0; memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe)); if (flags & GET_MC_CLEAR_RET) { mcp->mc_gpr[3] = 0; mcp->mc_gpr[4] = 0; } /* * This assumes that floating-point context is *not* lazy, * so if the thread has used FP there would have been a * FP-unavailable exception that would have set things up * correctly. */ if (pcb->pcb_flags & PCB_FPU) { KASSERT(td == curthread, ("get_mcontext: fp save not curthread")); critical_enter(); save_fpu(td); critical_exit(); mcp->mc_flags |= _MC_FP_VALID; memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double)); memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double)); } /* XXX Altivec context ? */ mcp->mc_len = sizeof(*mcp); return (0); } int get_mcontext(struct thread *td, mcontext_t *mcp, int flags) { int error; error = grab_mcontext(td, mcp, flags); if (error == 0) { PROC_LOCK(curthread->td_proc); mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]); PROC_UNLOCK(curthread->td_proc); } return (error); } int set_mcontext(struct thread *td, const mcontext_t *mcp) { struct pcb *pcb; struct trapframe *tf; pcb = td->td_pcb; tf = td->td_frame; if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp)) return (EINVAL); /* * Don't let the user set privileged MSR bits */ if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) { return (EINVAL); } memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame)); if (mcp->mc_flags & _MC_FP_VALID) { if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) { critical_enter(); enable_fpu(td); critical_exit(); } memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double)); memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double)); } /* XXX Altivec context? */ return (0); } void cpu_boot(int howto) { } /* * Shutdown the CPU as much as possible. */ void cpu_halt(void) { OF_exit(); } void cpu_idle(void) { /* Insert code to halt (until next interrupt) for the idle loop */ } /* * Set set up registers on exec. */ void exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings) { struct trapframe *tf; struct ps_strings arginfo; tf = trapframe(td); bzero(tf, sizeof *tf); tf->fixreg[1] = -roundup(-stack + 8, 16); /* * XXX Machine-independent code has already copied arguments and * XXX environment to userland. Get them back here. */ (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo)); /* * Set up arguments for _start(): * _start(argc, argv, envp, obj, cleanup, ps_strings); * * Notes: * - obj and cleanup are the auxilliary and termination * vectors. They are fixed up by ld.elf_so. * - ps_strings is a NetBSD extention, and will be * ignored by executables which are strictly * compliant with the SVR4 ABI. * * XXX We have to set both regs and retval here due to different * XXX calling convention in trap.c and init_main.c. */ /* * XXX PG: these get overwritten in the syscall return code. * execve() should return EJUSTRETURN, like it does on NetBSD. * Emulate by setting the syscall return value cells. The * registers still have to be set for init's fork trampoline. */ td->td_retval[0] = arginfo.ps_nargvstr; td->td_retval[1] = (register_t)arginfo.ps_argvstr; tf->fixreg[3] = arginfo.ps_nargvstr; tf->fixreg[4] = (register_t)arginfo.ps_argvstr; tf->fixreg[5] = (register_t)arginfo.ps_envstr; tf->fixreg[6] = 0; /* auxillary vector */ tf->fixreg[7] = 0; /* termination vector */ tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */ tf->srr0 = entry; tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT; td->td_pcb->pcb_flags = 0; } #if !defined(DDB) void Debugger(const char *msg) { printf("Debugger(\"%s\") called.\n", msg); } #endif /* !defined(DDB) */ /* XXX: dummy {fill,set}_[fp]regs */ int fill_regs(struct thread *td, struct reg *regs) { return (ENOSYS); } int fill_dbregs(struct thread *td, struct dbreg *dbregs) { return (ENOSYS); } int fill_fpregs(struct thread *td, struct fpreg *fpregs) { return (ENOSYS); } int set_regs(struct thread *td, struct reg *regs) { return (ENOSYS); } int set_dbregs(struct thread *td, struct dbreg *dbregs) { return (ENOSYS); } int set_fpregs(struct thread *td, struct fpreg *fpregs) { return (ENOSYS); } int ptrace_set_pc(struct thread *td, unsigned long addr) { /* XXX: coming soon... */ return (ENOSYS); } int ptrace_single_step(struct thread *td) { /* XXX: coming soon... */ return (ENOSYS); } /* * Initialise a struct pcpu. */ void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz) { } /* * kcopy(const void *src, void *dst, size_t len); * * Copy len bytes from src to dst, aborting if we encounter a fatal * page fault. * * kcopy() _must_ save and restore the old fault handler since it is * called by uiomove(), which may be in the path of servicing a non-fatal * page fault. */ int kcopy(const void *src, void *dst, size_t len) { struct thread *td; faultbuf env, *oldfault; int rv; td = PCPU_GET(curthread); oldfault = td->td_pcb->pcb_onfault; if ((rv = setfault(env)) != 0) { td->td_pcb->pcb_onfault = oldfault; return rv; } memcpy(dst, src, len); td->td_pcb->pcb_onfault = oldfault; return (0); } void asm_panic(char *pstr) { panic(pstr); }